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eta
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{{About|the Greek letter|other uses|Eta (disambiguation)}}{{Greek Alphabet|letter=eta}}Eta (uppercase {{Script|Grek|Η}}, lowercase {{Script|Grek|η}}; ē̂ta {{IPA-el|êːtaː|}} or ita {{IPA-el|ˈita|}}) is the seventh letter of the Greek alphabet. Originally denoting a consonant /h/, its sound value in the classical Attic dialect of Ancient Greek was a long vowel {{IPA|[ɛː]}}, raised to {{IPA-el|i|}} in hellenistic Greek, a process known as iotacism.In the ancient Attic number system (Harodianic or acrophonic numbers), the number 100 was represented by "{{Script|Grek|Η}}", because it was the initial of ΗΕΚΑΤΟΝ, the ancient spelling of ἑκατόν = "one hundred". In the latter system of (Classical) Greek numerals it has a value of 8. Eta was derived from the Phoenician letter heth (File:Phoenician heth.svg|20px). Letters that arose from eta include the Latin H and the Cyrillic letter И.

History

Consonant h

File:41 - Stoà of Attalus Museum - Ostracism against Megakles (487 BC) - Photo by Giovanni Dall'Orto, Nov 9 2009.jpg|thumb|right|Eta (heta) in the function of /h/ on the ostrakon of Megacles, son of Hippocrates, 487 BC. Inscription: ΜΕΓΑΚLES HIΠΠΟΚRATOS. On display in the Ancient Agora Museum in Athens, housed in the Stoa of AttalusStoa of AttalusFile:Hermes e Sarpedon.jpg|thumb|Eta in the function of /h/ on an Attic red-figured calyx-krater, 515 BC. Amongst the depicted figures are Hermes and (Hypnos]]. Inscriptions: HERMES - HYPNOS.)The letter shape 'H' was originally used in most Greek dialects to represent the sound /h/, a voiceless glottal fricative. In this function, it was borrowed in the 8th century BC by the Etruscan and other Old Italic alphabets, which were based on the Euboean form of the Greek alphabet. This also gave rise to the Latin alphabet with its letter H.Other regional variants of the Greek alphabet (epichoric alphabets), in dialects that still preserved the sound /h/, employed various glyph shapes for consonantal heta side by side with the new vocalic eta for some time. In the southern Italian colonies of Heracleia and Tarentum, the letter shape was reduced to a "half-heta" lacking the right vertical stem (Ͱ). From this sign later developed the sign for rough breathing or spiritus asper, which brought back the marking of the /h/ sound into the standardized post-classical (polytonic) orthography.Nick Nicholas (2003), "Greek /h/" {{webarchive|url=https://archive.is/20130901210905weblink |date=2013-09-01 }}Dionysius Thrax in the second century BC records that the letter name was still pronounced heta (ἥτα), correctly explaining this irregularity by stating "in the old days the letter Η served to stand for the rough breathing, as it still does with the Romans." Alfredus Hilgard (ed), "In artis Dionysianae §6" in Grammatici Graeci. Scholia in Dionysii Thracis Artem Grammaticam (1901), p. 486.

Long e

In the East Ionic dialect, however, the sound /h/ disappeared by the sixth century BC, and the letter was re-used initially to represent a development of a long vowel {{IPA|/aː/}}, which later merged in East Ionic with {{IPA|/ɛː/}} instead.BOOK, New Comparative Grammar of Greek and Latin, Andrew L., Sihler, illustrated, Oxford University Press, 1995, New York, 0-19-508345-8,weblink 10–20,
In 403 BC, Athens took over the Ionian spelling system and with it the vocalic use of H (even though it still also had the /h/ sound itself at that time). This later became the standard orthography in all of Greece.

Itacism

During the time of post-classical Koiné Greek, the {{IPA|/ɛː/}} sound represented by eta was raised and merged with several other formerly distinct vowels, a phenomenon called iotacism or itacism, after the new pronunciation of the letter name as ita instead of eta.Itacism is continued into Modern Greek, where the letter name is pronounced {{IPA|[ˈita]}} and represents the sound /i/ (a close front unrounded vowel). It shares this function with several other letters (ι, υ) and digraphs (ει, οι), which are all pronounced alike. This phenomenon at large is called iotacism.

Cyrillic script

Eta was also borrowed with the sound value of [i] into the Cyrillic script, where it gave rise to the Cyrillic letter И.

Uses

Letter

In Modern Greek, due to iotacism, the letter (pronounced {{IPA-el|ˈita|}}) represents a close front unrounded vowel, {{IPA|/i/}}. In Classical Greek, it represented a long open-mid front unrounded vowel, {{IPA|/ɛː/}}.

Symbol

Upper case

The uppercase letter Η is used as a symbol in textual criticism for the Alexandrian text-type (from Hesychius, its once-supposed editor).In chemistry, the letter H as symbol of enthalpy sometimes is said to be a Greek eta, but since enthalpy comes from ἐνθάλπος, which begins in a smooth breathing and epsilon, it is more likely a Latin H for 'heat'.In information theory the uppercase Greek letter H is used to represent the concept of entropy of a discrete random variable.

Lower case

The lowercase letter η is used as a symbol in:

Character encodings

  • Greek Eta, Coptic Hate
{{charmap
name1=Greek Capital Letter Etaname2=Greek Small Letter Etaname3=Greek Capital Letter Hetaname4=Greek Small Letter Hetaname5=Coptic Capital Letter Hatename6=Coptic Small Letter Hatemap2char1=86|map2char2=9Emap3char1=AA|map3char2=E1map4char1=C7|map4char2=E7ref1char2=eta}}
  • Mathematical Eta
{{charmap
name1=Mathematical BoldCapital Etaname2=Mathematical BoldSmall Etaname3=Mathematical ItalicCapital Etaname4=Mathematical ItalicSmall Etaname5=Mathematical Bold ItalicCapital Etaname6=Mathematical Bold ItalicSmall Eta}}{{charmapname1=Mathematical Sans-SerifBold Capital Etaname2=Mathematical Sans-SerifBold Small Etaname3=Mathematical Sans-SerifBold Italic Capital Etaname4=Mathematical Sans-SerifBold Italic Small Eta}}These characters are used only as mathematical symbols. Stylized Greek text should be encoded using the normal Greek letters, with markup and formatting to indicate text style.

References

{{Wiktionary|Η|η}}{{Reflist}}


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